WMP54GS ver 1.0 and 1.1

WMP54GS
Does anyone know what enhancements, if any, hardware version 1.1 has over
version 1.0?
I purchased a WMP54GS today at Bestbuy and discovered it was a ver 1.0 and that
ver 1.1 is also available. I've goggled all evening trying to learn what the
differences are between the 2 versions. No luck.
I did notice at the store that some of the boxes had serial numbers that started
MGP and other boxes had serial numbers that had a completely different front
end. (forget now)
I ended up buying the version that had the highest numerical MAC address
thinking that if there were model differences that might be a good indicator.
Wrong.